Window-pulley.



No. 644,084. Patented Feb. 27, I900.

A. 'A. LIBBY. WINDOW PULLEY.

(Application filed Sept. 25, 1899.)

(No Modal.)

NITED STATES ALFRED A. LIBBY, OF PORTLAND, MAINE, ASSIGNOB or ONE-HALF TO BENJAMIN F. ALLEN, or sAME PLAoE.

WINDOW-PULL EY.

SPECIFICATION forming part of Letters Patent No. 644,084, dated February 27, 1906.

Application filed Septemb r 25,1899. Serial No. 731,556. (No model.)

To all whom it may concern:

Be it known that I, ALFRED A. LIBBY, a citizen of the United States, residing at Portland, in the county of Cumberland and State of Maine, have invented certain new and useful Improvements in Window-Pulleys and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in window-pulleys, and is especially designed to produce a simple easily-constructed windowpulley and one that can be readily and quickly adjusted to the window-frame.

To that end it consists of a shell in which is mounted a sheave of any suitable form and in any suitable manner, said shell being provided with tapering ends, with an overhanging lip on one end and a diagonal groove on the other end. In window-pulleys as previously constructed it has been customary to have a plate provided with sockets into which screws are set, these screws extending through the plate and into the window-frame, thus holding the pulley firmly in place in the frame. This has been inconvenient, makes more or less trouble in adjusting the pulley in the window-frame, and is a source of some disfigurement to the frame.

In the drawings herewith accompanying and forming a part of this application, Figure 1 is a vertical section taken through the windowframe, sides of the frame being broken away, showing my improved device in position. Fig. 2 is an end view of the shell and pulley, showing the groove.

Same letters of reference refer to like parts in both figures.

In said drawings, A represents a windowframe provided with an opening B, said opening being provided with tapering ends B and tapering sides 0, said opening being larger at the outer side. By the outer side is meant that part of the frame which is in sight when the frame is in position. Adapted to fit in said tapering opening is a shell 0, provided with tapering ends D and tapering sides D, the taper on said ends and sides corresponding to the taper in'the opening in the frame,

thereby causing the superficial area of the outer edge H to be greater than the inner edge I. One of the ends of the shell is provided with an overhanging lip E. This lip may be made integral with the shell or attached there- -to in any suitable mannerand is adapted,

after the shell has been inserted within the window-frame, to bear against the inner side of the frame and serves to prevent the shell from being withdrawn from the frame by the movement of the window-cord over it or by any sudden jar that may be brought thereon by the rapid movement of the window-sash when being opened or closed. I do not wish to limit myself to the exact form of overhanging lip as shown, for any similar means for holding the shell in place can be employed without departing from the spirit of my invention. The other end of the shell is provided with a diagonal groove F, extending from near the top of said end nearly to the opposite side thereof and of sufficient depth to allow a brad or similar means to be inserted, so that after the shell has been placed in position in the frame a brad or similar means may be driven into the frame and through the groove, and thus prevent the pulley from being withdrawn from the frame. This groove, starting as it does from the inner side of the shell and frame, allows the brad to be driven in from the inner side of the frame, so that when the frame is in position the brad will not be seen, the pulley-frame presenting a smooth and continuous surface. Mounted in the shell in the usual manner is a sheave G, over which the window-cord is allowed to run.

In order to insert my improved windowpulley in the frame, the shell is so inclined as to allow the end provided with the lip to be inserted first in the opening. Then the shell is pressed in from the opposite end until the opening in the frame is completely filled, when by the tapering form of the opening that is, its decreasing in size as it extends to the inner edge of the frame-and from the corresponding taper of the shell the pulley is held firmly in position. Then, if necessary, a brad may be inserted from the inner side of the frame at such an angle that it will register with the grooveF, and thereby the pulley is held from displacement.

In the drawings herewith accompanying I have shown the shell cast in one piece; but I do not Wish to limit myself to this exact manner of construction. The shell may be cast in separate sections and bolted together in any suitable manner. This can be done Without departing at all from the spirit of my invention.

Havingthus described my invention and its use, I claim- 1. In a Window-pulley, in combination, a shell provided with tapering ends, a lip on one end and a groove extending diagonally across the other end thereof on the other, substantially as and for the purposes set forth.

2. In a window-pulley, a shell formed with a groove extending diagonally across the end thereof to receive a fastening device extending from the inner surface of the structure in which said shell is mounted, substaniiall y as and for the purposes set forth.

3. In a window-pulley, in combination, a shell provided with tapering ends, a sheave pivotally mounted therein, an overhanging lip on the inner side thereof and made integral With one end of said shell, the other end of said shell being provided with a diagonallydisposed groove, substantially as and for the purposes set forth.

4. In a Window-pulley, in combination, a shell having a sheave mounted therein, said shell having tapering sides and ends, the superficial area of the outer edge being greater than that of the inner edge, one of said ends having on its inner side an overhanging lip made integral therewith, the other of said ends having a groove extending diagonally from a point near its inner edge nearly to the opposite edge of said end, substantially as and for the purposes set forth.

5. In a Window-pulley, in combination, a shell formed with a groove extending diagonally across one end thereof to receive a fastening device extending from the surface of the structure in Whichsaid shell is mounted and means on the other end of said shell for preventing it from being removed from its confining structure, substantially as and for the purposes set forth.

In testimony whereof I affix my signature, in presence of two witnesses, this 20th day of September, 1899.

ALFRED A. LIBBY.

Witnesses:

NATHAN CLIFFORD, BENJ. F. ALLEN. 

